Complexes of cadmium(II) and mercury(II) with polyamines, nucleosides and nucleotides

• Autorzy: Łomozik L. , Brieger-Jarzębowska R.
• Języki publikacji: EN

Abstrakty

EN

Computer analysis of potentiometric titration data was applied for determination of stability constants of Cd(II) and Hg(II) complexes in binary systems with polyamines (PA), nucleosides (Nuc) and nucleotides (NMP). For the systems of Hg(II) and PA an untypical increase in the complex stability with increasing ring size was observed and interpreted as the mercury preference to formation of linear complexes. Results of the potentiometric and 13CNMR studies for the complexes of both metal indicate the involvement of all donor nitrogen atoms of di- and triamines in the coordination, leading to formation of N2 and N3 type chromophores, respectively. Monodentate complexes of Hg(II) with Cyd are formed already at very low pH (complexes with Cd from pH of about 4). In the systems with AMP apart from nitrogen donor atoms, also the phosphate groups are involved in coordination. In the solid complexes of Cd(II) and Hg(II) with PA all donor atoms from the polyamines were found to be involved in the coordination and the presence of nitrate ions was established both in the inner and in the outer coordination spheres.

Słowa kluczowe

EN

cadmium(II); mercury(II); polyamines; nucleosides; nucleotides; complexes

• Wydawca: Polskie Towarzystwo Chemiczne
• Czasopismo: Polish Journal of Chemistry
• Rocznik: 1999
• Tom: vol. 73 nr 6
• Strony: 927--940

Twórcy

autor

Łomozik L.

autor

Brieger-Jarzębowska R.

• Wydział Chemii Uniwersytet Adama Mickiewicza ul. Grunwaldzka 6 60-780 Poznań